AC Motor Control TRIZ Cases

A pump assembly controller tunes input voltage to minimize switching losses in the frequency converter.

A silicon carbide MOSFET integrates dummy sense regions with Schottky diodes to maintain capacitance.

Sector-based voltage command modification eliminates division calculations to reduce processing time while maintaining accurate current detection.

Controller reduces upper limit torque at zero swing speed to prevent uneven coil heating without multiple sensors.

Direct AC startup followed by VFD control resolves high starting current limitations while maintaining 11,500 RPM precision.

A motor driving circuit detects zero voltage crossing points to control bidirectional AC switch timing.

A motor control circuit uses one hall sensor and digital models to drive phase commutation in three-phase motors.

A digital signal processor calibrates current sensing instants to latch accurate phase values across operational modes.

Phase-locked loops compensate for Ethernet packet delay and loss to maintain accurate motor speed control.

A motor control device uses a stop signal generator to halt the AD conversion clock during PWM switching events.

A control device segments two six-phase motors into independent three-phase units with series interconnections and separate inverters.

A motor position calculation method compensates for hall sensor signal measurement delays using dynamic error correction algorithms.

A control apparatus manages DC/AC converter capacitor discharge through current supply and shaft braking mechanisms.

Parallel power conversion modules divide energy storage unit power across multiple electric machine sections to manage high voltage requirements.

A parallel converter module uses magnetic field cancellation to maintain balanced current across multiple conversion units.

An electrical control device regulates energy flow between a DC link and an energy storage unit based on RMS current values.

A sensorless brushless motor drive detects initial rotor position using induced voltage differences across energized phases.

Parallel stator winding generates stable power across load fluctuations without mechanical commutators.

A passive power network circuit between an inverter and motor modifies impedance to increase output voltage without adding switches or raising DC-link stress.

Planar semiconductor modules with resin sealing and a cover support structure reduce overhang to enhance vibration resistance.

Synchronizing inverter carrier frequency with AC voltage frequency via integer multiples reduces switching loss and acoustic noise.

Constant current control suppresses torque variations from temperature changes, improving reference position learning precision.

An integrated DC-DC converter eliminates redundant rectifiers, reducing device complexity and energy loss.

A motor control device measures smoothing capacitor capacity to predict remaining life using recorded deterioration data.

A sensorless spindle motor driving system adjusts floating phases to detect rotor position without dedicated hardware.

Adjusts PWM modulation phases based on measured circulating currents to resolve component stress and avoid expensive isolation transformers.

Merging rectifiers and filters into one housing reduces diode size while minimizing DC bus voltage ripple in vehicle power systems.

A sensorless control system estimates rotor position using voltage test pulses and damped resonance responses.

Synchronizing phase voltages reduces electromagnetic noise from neutral point potential variations without adding passive filters.

Dual microcomputers on opposite substrate sides suppress area growth while maintaining redundancy.

Segmented coil control zones manage overlapping carrier positions to prevent collisions while maintaining precise independent positioning.

A dual-filler semiconductor design uses silicone rubber to seal peripheral gaps and prevent air bubble formation.

Segmented system circuits with independent relay means maintain control continuity despite component failures.

A dual regulator control architecture processes stationary frame currents to suppress subharmonic oscillations in electric motor inverters.

A controller produces motor control data in periodic time periods to generate stable voltage commands.

A motor control apparatus dynamically switches between three-phase and two-phase modulation schemes based on rotational speed to optimize power efficiency.

Placing a current-compensated choke on the DC input side suppresses common-mode interference without requiring complex multi-phase chokes on the AC output.

Segmented inverter circuits supply AC power to insulated coils, increasing total capacity while minimizing individual component complexity.

An inverter control power supply detects main SMPS voltage drops and activates an auxiliary unit to maintain stable operation.

A DC monitoring system measures voltage ripple ratios across variable frequency drive buses to detect early capacitor degradation.

Stacked electromotive elements drive aircraft rotors via coaxial freewheels, uncoupling during failure to maintain propulsion reliability.

A power tailgate motor applies electrical braking to hold the rotatable element in position.

A motor controller charging discharge circuit performs voltage step-up operations to transfer electrical energy from a capacitor to a DC link.

An integrated solid-state circuit breaker within an AC-AC power converter utilizes bi-directional switching blocks to control current flow.

A control device drives semiconductor switches with short pulses to convert intermediate circuit capacitor energy into heat.

A lead angle estimator calculates phase-sample differences at voltage extrema to determine motor orientation without position sensors.

A silicon carbide junction termination extension structure with a constant concentration gradient reduces the termination area while maintaining stable breakdown voltage.

Extracting permanent magnets from the stator reduces weight and cost while maintaining propulsion force generation.

Annular power capacitors mount diametrically on transmission housings to provide large surface areas for air or liquid cooling.

A motor drive circuit dynamically adjusts power factor correction output voltage using a dedicated analog feedback loop.